<?php

/**
 * This is the model class for table "{{comment}}".
 *
 * The followings are the available columns in table '{{comment}}':
 * @property integer $id
 * @property string $article_id
 * @property string $content
 * @property integer $status
 * @property string $create_time
 * @property string $author
 * @property string $email
 * @property string $url
 */
class Comment extends CActiveRecord {

    const STATUS_PENDING = 1;
    const STATUS_APPROVED = 2;

    /**
     * Returns the static model of the specified AR class.
     * @param string $className active record class name.
     * @return Comment the static model class
     */
    public static function model($className = __CLASS__) {
        return parent::model($className);
    }

    /**
     * @return string the associated database table name
     */
    public function tableName() {
        return '{{comment}}';
    }

    /**
     * @return array validation rules for model attributes.
     */
    public function rules() {
        // NOTE: you should only define rules for those attributes that
        // will receive user inputs.
        return array(
            array('content, author, email', 'required'),
            array('author, email, url', 'length', 'max' => 128),
            array('email', 'email'),
            array('url', 'url'),
        );
    }

    /**
     * @return array relational rules.
     */
    public function relations() {
        return array(
            'article' => array(self::BELONGS_TO, 'Article', 'Article_id'),
        );
    }

    /**
     * @return array customized attribute labels (name=>label)
     */
    public function attributeLabels() {
        return array(
            'id' => 'ID',
            'article_id' => 'Article',
            'content' => 'Content',
            'status' => 'Status',
            'create_time' => 'Create Time',
            'author' => 'Author',
            'email' => 'Email',
            'url' => 'Url',
        );
    }

    /**
     * Approves a comment.
     */
    public function approve() {
        $this->status = Comment::STATUS_APPROVED;
        $this->update(array('status'));
    }

    /**
     * @param Post the post that this comment belongs to. If null, the method
     * will query for the post.
     * @return string the permalink URL for this comment
     */
    public function getUrl($article = null) {
        if ($article === null)
            $article = $this->article;
        return $article->url . '#c' . $this->id;
    }

    /**
     * @return string the hyperlink display for the current comment's author
     */
    public function getAuthorLink() {
        if (!empty($this->url))
            return CHtml::link(CHtml::encode($this->author), $this->url);
        else
            return CHtml::encode($this->author);
    }

    /**
     * @return integer the number of comments that are pending approval
     */
    public function getPendingCommentCount() {
        return $this->count('status=' . self::STATUS_PENDING);
    }

    /**
     * @param integer the maximum number of comments that should be returned
     * @return array the most recently added comments
     */
    public function findRecentComments($limit = 10) {
        return $this->with('article')->findAll(array(
                    'condition' => 't.status=' . self::STATUS_APPROVED,
                    'order' => 't.create_time DESC',
                    'limit' => $limit,
                ));
    }

    /**
     * This is invoked before the record is saved.
     * @return boolean whether the record should be saved.
     */
    protected function beforeSave() {
        if (parent::beforeSave()) {
            if ($this->isNewRecord)
                $this->create_time = time();
            return true;
        }
        else
            return false;
    }

    /**
     * Retrieves a list of models based on the current search/filter conditions.
     * @return CActiveDataProvider the data provider that can return the models based on the search/filter conditions.
     */
    public function search() {
        // Warning: Please modify the following code to remove attributes that
        // should not be searched.

        $criteria = new CDbCriteria;

        $criteria->compare('id', $this->id);
        $criteria->compare('article_id', $this->article_id, true);
        $criteria->compare('content', $this->content, true);
        $criteria->compare('status', $this->status);
        $criteria->compare('create_time', $this->create_time, true);
        $criteria->compare('author', $this->author, true);
        $criteria->compare('email', $this->email, true);
        $criteria->compare('url', $this->url, true);

        return new CActiveDataProvider($this, array(
                    'criteria' => $criteria,
                ));
    }

}